Signal alarm system



Dec. 20, C p STANBON I SIGNAL ALARM SYSTEM Filed Feb. 2, 1952 13/437425 F. Elia-M15017 Imvewfnv Av fcn we Patented Dec. 20, 1932 ITED STATES CHARLES P. STANBON, OF LYNN, MASSACHUSETTS SIGNAL ALARM SYSTEM Application filed February desirable to install an inexpensive and efficient alarm system designed to make known or announce existence of fire or extreme heat.

It has for its purposes to provide a novel and inexpensive automatic fire alarm; to provide a new and novel construction for such an alarm; to provide an efficient and inexpensive mounting and adjusting means therefor; to provide an improved, simple, efficient,-and inexpensive exterior mounting, easily adjusted to meet the requirements of varying degrees Fahrenheit; to provide a new and novel combination in a wiring circuit of the mounting means and adjustment control; to provide a new and novel slotted post having wire carrying orifices therein at right angles to said slot adaptable to receive and hold the ends of the wires of the circuit direct and positively in line so that they may be at all times in position to properly function with the heat expansion, and to afford ready access for adjustment by gauge or otherwise; and to provide the various other advantages and results made evident from the following specification.

I accomplish the objects of my invention by mounting the ends of two wires .(connected with a source of energy and buzzer or bell alarm) upon an insulation block, adaptable to be sunk within a ceiling so that the plane of one side thereof is on line with the plane of the ceiling. At approximately the center of said insulation block, I place a slotted post of insulating material having a wire carrying orifice therethrough at right angles 0 with the slot therein, said orifice being designed to hold the wire ends in fixed position opposite each other. The wire ends are positioned in said orifice so that they are both visible at the slot in said post, and are then spaced at approximately three thousandths of an inch, this spacing being adaptable for perfecting the contacting of the ends at approximately one hundred degrees Fahrenn heit. The wires are then extended along said insulation block in opposite directions from 2,1932. Serial No. 590,454.

the center post and turned about the ends of said mounting block where they pass beneath adjusting screws adaptable to increase or decrease the space between the wire ends at said slot, and are then secured on the side of the mounted block opposite the center post at proper terminals and connections to the source of energy and alarm buzzers or bells. The insulation mounting is then placed in proper prepared receptacle in a ceiling with the post extending downward. A breast plate is optionally placed over the mounting so as to leave exposed only the post and the connected wires. When so positioned within a room, the device will respond to any degrees Fahrenheit for which it is set, the three thousandths of an inch spacing being adaptable to affect the contact at approximately one hundred degrees. If it is desired to have the device function at degrees Fahrenheit in excess of one hundred, the space between the wire ends will be increased by adjusting the screws at the ends of the mounting block.

WVhile I have illustrated and described a preferred constructionfor carrying my in-v vention into effect, this is capable of variation or-modification without departing from the spirit of the invention; I therefore do not wish to be limited to the exact details of construction herein set forth, but desire 8 to avail myself or such variations and modifications as come within the scope of the appended claims.

Referring to the accompanying drawing which forms a part of this specification and in which similar letters of reference refer to similar parts throughout the various views, Figure 1 shows an exterior plan view of my device as it appears when mounted in a ceiling. Figure 2 shows a cross sectional view of my device on the line 2*2'111 Figure 1. i

Referring again to the drawing, A shows the ceiling. I B shows the insulation block.

C shows the slotted post extending from the exposed surface of the insulation block. D and D show two wires, the ends of which extend through the orifice C in the post 0. The ends of said'wires being visiblein the slot C where they are sufliciently spaced apart so as to perfect a contact with the Wire expansion at varying degrees Fahrenheit. The wires are extended along said insulation block and turned about the ends of said block where they pass beneath the heads of the adjusting screws E and E said screws being adaptable by screwing out or in, to increase or decrease the space between the said wire ends at said slot, and are then secured on the side of the insulation block opposite the center post at the terminals F and F The screws E and E are preferably provided with orifices E and E so that they may be conveniently adjusted by placing a nail or other convenient tool in said slots for the purpose of turning said screws. G shows an exterior finishing plate mounted over the device when in proper position within a ceiling and leaving exposed to the vision, only the post C and the wires D and D The plate G is held in position by the screws G G G, and G H shows the screws by which the device is secured in position within a ceiling, preferably extending into floor timbers I.

The slot C in the post C, together with the adjusting screws E and E at the ends of the mounted block, render readily available the adjusting and spacing of the wire ends D and D in said slot. This spacing is readily gauged by the use of prepared tapers measuring three thousandths of an inch or upwards for adjustments required with the verying degrees Fahrenheit, the tapers being inserted between the wire ends during the adjusting process in order to secure the exact spacing desired.

Having thus described my invention, I claim as new and desire to secure by Letters Patent of the United States of America 1. I11 a device of the kind described, an insulation block, two wires mounted upon said insulation block, a slotted post extending from one side of said block, said post having an orifice therethrough at substantially right angles to said slot adaptable to hold the ends of said wires directly and positively in line, the ends of said wires being positioned in said orifice so that said ends are visible at said slot and sufiiciently distanced therein to contact with the heat expansion of the wires at any desired degrees Fahrenheit, said wires extending along said insulation block around the ends thereof to fixed terminals and contacts on the side of said insulation block opposite said post, adjustment screws at the ends of said block, said wires passing beneath the heads of said adjusting screws.

2. In a device of the kind described, an insulation block, a slotted post mounted thereon, said post having an orifice therein at substantially right angles to said slot, an adjusting screw positioned at one end of said mounting block, fixed terminals on the side of said mounting block opposite said post, and two wires mounted on said block so as to pass beneath the head of said adjusting screw and extending therefrom to and through the orifice in said post so that the ends thereof are spaced at the slot in said post at the required distance to contact with the heat expansion of the wires at any desired degrees Fahrenheit.

3. In a device of the kind described, an insulation block, a slotted post thereon having an orifice therethrough at substantially right angles to said slot adaptable to receive and hold the ends of two wires directly and positively in line, two wires positioned within 1 said orifice so that the ends thereof are visible at said slot and sufficiently distanced therein to contact with the heat expansion of the wires, and means for adjusting the distance between said wire ends.

4. In a device of the kind described, a slotted post having an orifice therethrough at substantially right angles to said slot adaptable to receive and hold the ends of two wires directly and positively in line, two wires positioned within said orifice so that the ends thereof are visible at said slot, and sufficiently distanced therein to contact with the heat expansion of the wires, and means for adjusting the space between the ends of said wires at said post.

5. In a device of the kind described. an insulated mounting block, a slotted post mounted thereon, said post having an orifice therethrough at substantiall right angles to said slot, to wires, the end s of which are positioned and held in said orifice directly and positively in line, the ends of said wires being visible at said slot and sufliciently distanced therein to contact with the heat expansion of the wires, and adjusting means adaptable to vary the distance between the ends of said wires, said means comprising filister headed screws with a series of orifices through the heads thereof so as to afford ease of exterior adjustment.

In testimony whereof I affix my signature.

CHARLES P. STANBON. 

